Hogwash. Neither the details of God's creation efforts, nor what it means to be "mature" are explained with sufficient clarity in the text for this to be a foregone conclusion.
It is always good to point out to people the ramifications of their reasoning. It is not good to reject the statement of the only available witness who was at the Beginning. Choosing to reject His plain statement can have adverse effects on ones eternal destiny.
Balony artists who claim to have direct access to God's mouth have always been with us--fortunately, they can't do as much damage as they used to, in civilized countries with constitutionally limited republican governments.
From another post I made:
The creation of the world and the creation of man are connected repeatedly throughout scripture:
Isa 45:12 I have made the earth, and created man upon it: I, [even] my hands, have stretched out the heavens, and all their host have I commanded.
Zec 12:1 The burden of the word of the LORD for Israel, saith the LORD, which stretcheth forth the heavens, and layeth the foundation of the earth, and formeth the spirit of man within him.
Isa 42:5 Thus saith God the LORD, he that created the heavens, and stretched them out; he that spread forth the earth, and that which cometh out of it; he that giveth breath unto the people upon it, and spirit to them that walk therein:
Isa 45:18 For thus saith the LORD that created the heavens; God himself that formed the earth and made it; he hath established it, he created it not in vain, he formed it to be inhabited: I [am] the LORD; and [there is] none else.
Isa 40:21-22
Have ye not known? have ye not heard? hath it not been told you from the beginning? have ye not understood from the foundations of the earth?
Isa 64:4 For since the beginning of the world [men] have not heard, nor perceived by the ear, neither hath the eye seen, O God, beside thee, [what] he hath prepared for him that waiteth for him.
Again, more passages speaking about Adam being created:
Gen 2:7 And the LORD God formed man [of] the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
Gen 5:1 This [is] the book of the generations of Adam. In the day that God created man, in the likeness of God made he him;
Deu 4:32 For ask now of the days that are past, which were before thee, since the day that God created man upon the earth,
And the myth called Adam lived a specific number of years, then the myth died.
Gen 5:5 And all the days that Adam lived were nine hundred and thirty years: and he died.
It all ties together scripturally.
And no good study of beginnings can go without a passage written by the finger of God on the tablets of stone, which tends to override any scholars desire to reattribute it to the eating of a bad pickle.
Exd 20:8-11
8 Remember the sabbath day, to keep it holy.
9 Six days shalt thou labour, and do all thy work:
10 But the seventh day [is] the sabbath of the LORD thy God: [in it] thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that [is] within thy gates:
11 For [in] six days the LORD made heaven and earth, the sea, and all that in them [is], and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.
A direct correlation.
But, in the fossil record, MUCH clarity is seen, but you evil CREVO's ignore it!"
--EvoGuy